Santé et Fitness

Child & Adult Height Predictor Calculator — Khamis-Roche & Mid-Parental Method

Parents frequently wonder how tall their children will grow. Our free height calculator uses recognized pediatric methods—including the Mid-Parental Target Height and Khamis-Roche formulas—to estimate adult height potential based on biological parents' heights, child's current age, and current stature. Whether you are curious about toddler growth trajectories or checking a adolescent growth curve, this tool functions as a reliable predicted adult height calculator.

Child Adult Height Predictor Calculator

Estimate a child's future adult height using the Mid-Parental Height genetic formula

Child's Gender

Mother's Height

Feet (ft)

Inches (in)

Father's Height

Feet (ft)

Inches (in)

Predicted Adult Height Summary

Most Probable Adult Height

5' 10"

177 cm

Estimated 95% Confidence Growth Range

5' 8" – 5' 12"

171 cm – 182 cm (± 2 inches variance)

Formula Used: Mid-Parental Height Method (Tanner / Khamis-Roche standard).

Mathematical Formulas & Calculation Methods

Mid-Parental Target Height Formula (Boy)

Calculates mid-parental height expectation for male children based on parents' combined heights.

Target Height (cm) = ((Father's Height + Mother's Height + 13 cm) / 2)

Mid-Parental Target Height Formula (Girl)

Calculates mid-parental height expectation for female children based on parents' combined heights.

Target Height (cm) = ((Father's Height + Mother's Height - 13 cm) / 2)

Khamis-Roche Height Prediction Method

Combines child's current height, current body weight, and average parental height with age-specific statistical coefficients.

Predicted Height = β0 + (β1 × Child Height) + (β2 × Child Weight) + (β3 × Mid-Parental Height)

Worked Step-by-Step Examples

Example 1: Mid-Parental Height Prediction for a Boy

"Calculate target adult height for a boy whose father is 180 cm tall and mother is 165 cm tall."

Steps:

Sum father's and mother's heights: 180 + 165 = 345 cm.
Add 13 cm for male adjustment: 345 + 13 = 358 cm.
Divide by 2: 358 / 2 = 179 cm (approx. 5 feet 10.5 inches).

Result: Target Mid-Parental Height: 179 cm (± 5 cm range)

What is Calculateur de Child & Adult Height Predictor?

A height calculator is an analytical growth predictor tool that estimates a child's eventual adult stature based on genetics and current growth measurements.

Understanding how tall will my child be calculator methods involves recognizing that genetic potential accounts for roughly 80% of adult height variance. Environmental factors such as proper nutrition, restful sleep, and physical activity account for the remaining percentage.

The target mid-parental height calculator method provides a baseline genetic expectation with a standard deviation range of approximately ±2 inches (±5 cm), while the Khamis-Roche method offers refined accuracy for children aged 4 to 17.

How to Use Calculateur de Child & Adult Height Predictor

1Select the child's sex and enter their current age and current height.
2Enter the biological father's height and biological mother's height.
3Optionally enter the child's current weight for refined Khamis-Roche calculation.
4Click calculate to view predicted adult height in inches, feet, and centimeters along with target ranges.

Key Features

Dual calculation algorithms: Mid-Parental and Khamis-Roche methods.
Supports both Imperial (feet/inches) and Metric (centimeters) inputs.
Provides expected target range percentile bounds (95% confidence interval).
Clear graphical representation of genetic growth potential.

Benefits of Using Calculateur de Child & Adult Height Predictor

Helps parents monitor normal developmental growth milestones.

Assists pediatricians in identifying potential growth delays early.

Provides fun and informative predictions for growing families.

Practical Use Cases

Parents

Estimate future adult height for toddlers, children, and teenagers.

Pediatric Professionals

Quickly assess whether a child's growth stays within genetic mid-parental target bounds.

Frequently Asked Questions

At what age do boys and girls stop growing in height?

Most girls complete height growth around age 14 to 16 (1–2 years after menarche), while boys usually continue growing until age 16 to 18.

How accurate is a predicted adult height calculator?

Mid-parental height predictions generally fall within ±2 inches (5 cm) of final adult height for non-pathological growth curves.

Calculateurs Similaires

Math & Algebra